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Journal article
SEARCH FOR EXTRATERRESTRIAL ANTINEUTRINO SOURCES WITH THE KamLAND DETECTOR
The Astrophysical journal, v 745(2)
01 Feb 2012
Abstract
We present the results of a search for extraterrestrial electron antineutrinos ((nu) over bar (e)'s) in the energy range 8.3 MeV E-<(nu) over bare < 31.8 MeV using the KamLAND detector. In an exposure of 4.53 kton-year, we identify 25 candidate events. All of the candidate events can be attributed to background, most importantly neutral current atmospheric neutrino interactions, setting an upper limit on the probability of B-8 solar nu(e)'s converting into nu(e)'s at 5.3 x 10(-5) (90% CL), if we assume an undistorted nu(e) shape. This limit corresponds to a solar nu(e) flux of 93 cm(-2) s(-1) or an event rate of 1.6 events (kton-year)(-1) above the energy threshold (E-<(nu)over bar>e >= 8.3 MeV). The present data also allows us to set more stringent limits on the diffuse supernova neutrino flux and on the annihilation rates for light dark matter particles.
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Details
- Title
- SEARCH FOR EXTRATERRESTRIAL ANTINEUTRINO SOURCES WITH THE KamLAND DETECTOR
- Creators
- A. Gando - Tohoku UniversityY. Gando - Tohoku UniversityK. Ichimura - Tohoku UniversityH. Ikeda - Tohoku UniversityK. Inoue - Institute for the Physics and Mathematics of the UniverseY. Kibe - Tokyo Institute of TechnologyY. Kishimoto - Tohoku UniversityM. Koga - Institute for the Physics and Mathematics of the UniverseY. Minekawa - Tohoku UniversityT. Mitsui - Tohoku UniversityT. Morikawa - Tohoku UniversityN. Nagai - Tohoku UniversityK. Nakajima - Tohoku UniversityK. Nakamura - Institute for the Physics and Mathematics of the UniverseK. Narita - Tohoku UniversityI. Shimizu - Tohoku UniversityY. Shimizu - Tohoku UniversityJ. Shirai - Tohoku UniversityF. Suekane - Tohoku UniversityA. Suzuki - Tohoku UniversityH. Takahashi - Tohoku UniversityN. Takahashi - Tohoku UniversityY. Takemoto - Tohoku UniversityK. Tamae - Tohoku UniversityH. Watanabe - Tohoku UniversityB. D. Xu - Tohoku UniversityH. Yabumoto - Tohoku UniversityH. Yoshida - Tohoku UniversityS. Yoshida - Tohoku UniversityS. Enomoto - University of TokyoA. Kozlov - University of TokyoH. Murayama - University of TokyoC. Grant - University of AlabamaG. Keefer - University of AlabamaA. Piepke - University of AlabamaT. I. Banks - University of California, BerkeleyT. Bloxham - University of California, BerkeleyJ. A. Detwiler - University of California, BerkeleyS. J. Freedman - University of TokyoB. K. Fujikawa - University of TokyoK. Han - University of California, BerkeleyR. Kadel - University of California, BerkeleyT. O'Donnell - University of California, BerkeleyH. M. Steiner - University of California, BerkeleyD. A. Dwyer - California Institute of TechnologyR. D. McKeown - California Institute of TechnologyC. Zhang - California Institute of TechnologyB. E. Berger - Colorado State UniversityC. E. Lane - Drexel UniversityJ. Maricic - Drexel UniversityT. Miletic - Rowan UniversityM. Batygov - Univ Hawaii Manoa, Dept Phys & Astron, Honolulu, HI 96822 USAJ. G. Learned - Univ Hawaii Manoa, Dept Phys & Astron, Honolulu, HI 96822 USAS. Matsuno - Univ Hawaii Manoa, Dept Phys & Astron, Honolulu, HI 96822 USAM. Sakai - Univ Hawaii Manoa, Dept Phys & Astron, Honolulu, HI 96822 USAG. A. Horton-Smith - University of TokyoK. E. Downum - Stanford UniversityG. Gratta - Stanford UniversityY. Efremenko - University of TokyoY. Kamyshkov - University of Tennessee at KnoxvilleO. Perevozchikov - University of Tennessee at KnoxvilleH. J. Karwowski - Triangle Univ Nucl Lab, Durham, NC 27708 USAD. M. Markoff - Triangle Univ Nucl Lab, Durham, NC 27708 USAW. Tornow - Triangle Univ Nucl Lab, Durham, NC 27708 USAK. M. Heeger - University of TokyoM. P. Decowski - University of Tokyo
- Publication Details
- The Astrophysical journal, v 745(2)
- Publisher
- Iop Publishing Ltd
- Number of pages
- 8
- Grant note
- 0833184 / Division Of Human Resource Development; National Science Foundation (NSF); NSF- Directorate for Education & Human Resources (EHR) 1316783 / Direct For Mathematical & Physical Scien; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS) DE-FG03-00ER41138; DE-AC02-05CH11231; DE-FG02-01ER41166 / U.S. Department of Energy (DOE); United States Department of Energy (DOE) 16002002 / Japanese Ministry of Education, Culture, Sports, Science and Technology; Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) 21684008 / Grants-in-Aid for Scientific Research; Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT); Japan Society for the Promotion of Science; Grants-in-Aid for Scientific Research (KAKENHI) World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan; Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) DOE; United States Department of Energy (DOE)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000300326800091
- Scopus ID
- 2-s2.0-84862931651
- Other Identifier
- 991019296563004721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics